Mumbai, June 9 -- Domestic debt yields moved up today as firm trend in US yields and elevated crude oil prices dominated sentiments. Yields were little changed after the Reserve Bank of India (RBI) cut its key lending rate, or the repo rate, by 50 basis points to 5.5% on Friday amid softening inflation. The yield on the 6.33 GS 10-year bond is up around 6 basis points to 6.28%, coming off three and half year low. Meanwhile, the Government of India has announced the buyback of its Securities through auction for an aggregate amount of Rs 26,000 crore (face value) on 12 June. These securities include: 5.63% GS 2026, 8.33% GS 2026, 6.97% GS 2026, 5.74% GS 2026 and 8.15% GS 2026. The US Treasury yields rose to three-week high Friday following ...